Electric locomotive.



H. G.'BBBBNTSEN.

` ELECTRIC LOGOMOTIVE.

APPLIOATION FILED JAN. 10, 1910.

Patented Jan. 17, 1911.l

HANS Gr. BEEENTSEN, OF PITTSBUBG, PENNSYLVANIA, ASSIG-NOR TO WESTINGHO'USE ELECTRIC .AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

ELECTRIC LOCOMOTIVE.

estaran Specicaton of Letters Patent.

Patented aan. 1jr, ieu.

Application led ianuary 10, 1910. Serial No. 537,244. 'v

To all whom 'it may concern:

Be it known that I, HANS G. BERENTSEN,

cation.

My invention relates to electric locomotives and other railway 'vehicles and particularly to such vehicles as are provided with motor-operated pony swinging adjustments.

The object of my invention is' to provide simple and effective means for Vresisting the tendency for the journal boxes of a locomotive, equipped as above indicated, to spread apart or to approach each other by reason of the fact that the driving effort exerted by a swinging pony truck is applied to the side frames at an angle to the direction of movement of the locomotive.

Pony.. trucks have heretofore been provided with such bearings in the sideframes of the locomotive as to permit a limited swinging adjustment about a point in the central plane of the vehicle and at some disv tance from the center line of the axle. When trucks of this character are used merely for guiding purposes there is only a small tendency for the journal boxes to either spread apart or approach each other, but when trucks of this character are provided with driving motors, there are obviously material components of the forces exerted upon the sideframes whichntend to either separate the journal boxes or draw them together, depending on the position of the truck and the direction of movement of the locomotive. Ir" these forces, which perform' no useful function, are not overcome, they create such 4an end thrust between the bearing boxes and either the axle collars or wheel hubs as to produce high temperatures and excessive wear.

According to my present invention, I bore a hole directly through the center of the axle to receive a tie-rod the ends of which are rigidly secured to the journal boxes, the arrangement being such that the tie-rod is subject to strains in tension or compression and only useful driving forces are transmitted from the journal boxes to the side frames. This arrangement commends itself, not only on account of the simplicity and trucks having limited on accountof the very small amount of labor which is' necessarily expended in adapting it.

to standard structures. large and are called upon to sustain great weights, it'is desirable to bore holes through their centers in order to remove the relatively poor metal commonly'known as the pipe which is produced when' they are forged.

Figure l of the accompanying drawings is a plan view, partially in section, of a pony truck of a locomotive which embodies my invention, a portion of the side frames of the locomotive being indicated for the sake of clearness of illustration. Fig. 2 is a sectional elevation through one of the journal boxes and Fig. 3 is an end view of the axle showing a, portion of the cross tie structure of my invention.

Referring to the drawings, the structure here shown comprises locomotive side frames 1 and 2, a pony truck 3 anda body 4 (only a part of which is shown) having a cross beam or transom 5. The pony truck 3 comprises an axle 6 provided with driv' wheels 7 and 8, journal boxes 9 and 10, which are supported in the side frames 1 and 2, as hereinafter pointed out, end brackets 11 and l2, a tie-rod 13. and an-el'ectric driving motor 14 which constitutes a radius frame for the truck and is pivotally connected to the transom 5 at a point 15. The motor 14 is provided with axle bearings 16 which surround the axle between the wheels 7 and 8 and adjacent to them, without interfering with the .normal rotation of the axle.

The brackets 11 and 12 are secured to the ends of the journal boxes 9 and 10 ,by means of bolts 17 and extend across the endsY of the axle 6. The tie-rod 13 extends through a hole 18 in the axle and is firmly secured at its ends to the brackets 11 and 12, the ends of the rod being'reduced in size to extend through holes 19 in the brackets and being screw-threaded to receive clamping nuts 20, The hole 18 in the axle is considerably larger than the tie-rod in order to prevent contact between the two parts, since one rotates while the other is stationary.

Since the motor frame is pivot-ally supported at the point 15, from transom 5, the pony truck rotates, as a whole, about this point as an axis, provided the relation leetween the bearing boxes and ther-side frames When the axles are Will permit it. A.limited swinging adjustment of this kind is provided for, as shown inthe drawings, by making the bearing surfaces 21- and 22 and' 23 and 24 between the boxes and the side frames substantially tangent to a circumference the center of which Y coincides With point 15.

'Ihe propelling forces which are exerted between the journal. boxes and the side frame are obviously transmitted through these engaging surfaces and, since these surfaces are oblique to the plane of the side frame and to the direction of movement of lthe'locomotive, there is a4 component'which performs no useful work and which tends to either draw the journal boxes togetherA or to force them apart,faccording to the direction in which the driving motor is operated. The tie-rod 13 is provided in order to overcome these components and to prevent theljournal boxes from being vforced againstthe axle collars 25,' on the one hand, or the wheel hubs 26on the-other.

The end brackets 11 and 12 to which the 'tie-rod is secured, may be replaced by any othef suitable structureswhich are secured to, or form parts of, t-he journal boxes. In order to maintain a concentric relation between the axle and the rod, it may be found of advantage to adj ustably support the brackcts on the journal boxes orto adjustably attach the rods -to the brackets. The tie-rod vis, however, preferably placed near the top of vthe hole in the axle and permitted to approach a concentric relation as the journal boxes wear. f

It is evident that my invention is not restricted to electrically propelled pony trucks, and structural modifications may 2. In a vehicle, the ycombination with a pony truck having a hollow axle, and parallel side frames supported on said truck and permitting a swinging adjustment thereof, of a tie rod extending through the hollow axle and fastened to the journal boxes to counteract the forces which tend to move said journal boxes toward and away from each other.

3.' In a vehicle, the combination With a pony truck comprising a Wheel axle and journal boxes therefor, of parallel side ce frames supported on the journal boxes of the truck and permitting a swiveling adjustment thereof, and a tie-rod which extends through the axle and is secured to the journal boxes.

- 4. In a railwayV vehicle, the combination4 with a p ony truck comprising a Wheel axle, journal boxes and a driving motor therefor,

of parallel side frames mounted on the jcurnal boxes and permitting a limited swinging adjustment of the truck, brackets secured to the journal boxes and .extendin across the ends of the axle, and a tie-r which extends loosely through a hole in the raxle and is secured to the brackets.

5. In a railway vehicle, the combination with a pony truck comprising a wheel axle, journal boxes and a driving motor therefor,

of parallel side frames mounted on the journal boxes and permitting a limited Swingin adjustment ofthe truck, brackets secure yto the journal boxes and extending across the ends .of the axle, and a tierod which extends loosely through a hole in the axle and is secured to the brackets, said motor being pivotally secured to the vehicle body and constituting a radius frame for the truck. j v

In testimony whereof, I have hereunto subscribed my naine this 6th day of Jan., 90

HANS G. BERENTSEN.

Witnesses ALVA Gr. Coreano, B. B. IIINES. j 

